vlib: show FD in 'show memory map'

Type: improvement
Change-Id: I04752c011e4ca58f56aa53f6ae27bae93a5c4590
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vppinfra/linux/mem.c b/src/vppinfra/linux/mem.c
index 96fb0db..ef98b3f 100644
--- a/src/vppinfra/linux/mem.c
+++ b/src/vppinfra/linux/mem.c
@@ -579,6 +579,7 @@
   hdr->base_addr = (uword) base;
   hdr->log2_page_sz = log2_page_sz;
   hdr->num_pages = size >> log2_page_sz;
+  hdr->fd = fd;
   snprintf (hdr->name, CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1, "%s", (char *) name);
   hdr->name[CLIB_VM_MAP_HDR_NAME_MAX_LEN - 1] = 0;
   mprotect (hdr, sys_page_sz, PROT_NONE);
diff --git a/src/vppinfra/mem.h b/src/vppinfra/mem.h
index e6f019c..9d0aa09 100644
--- a/src/vppinfra/mem.h
+++ b/src/vppinfra/mem.h
@@ -83,6 +83,9 @@
   /* page size (log2) */
   clib_mem_page_sz_t log2_page_sz;
 
+  /* file descriptor, -1 if memory is not shared */
+  int fd;
+
   /* allocation mame */
 #define CLIB_VM_MAP_HDR_NAME_MAX_LEN 64
   char name[CLIB_VM_MAP_HDR_NAME_MAX_LEN];